At 03:55 PM 4/14/2011 +0100, Michael Foord wrote:
Ricardo isn't suggesting that Python should always call super for
you, but when you *start* the chain by calling super then Python
could ensure that all the methods are called for you. If an
individual method doesn't call super then a theoretical
implementation could skip the parents
methods (unless another child calls super).
That would break classes that deliberately don't call super. I can
think of examples in my own code that would break, especially in
__init__() cases.
It's perfectly sensible and useful for there to be classes that
intentionally fail to call super(), and yet have a subclass that
wants to use super(). So, this change would expose an internal
implementation detail of a class to its subclasses, and make "fragile
base class" problems worse. (i.e., where an internal change to a
base class breaks a previously-working subclass).
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